Audio: MFCC: Fix mistake with HiFi4 circular buffer index

The instruction AE_L16_XC() uses circular buffer0, so the
buffer setup instruction need to be changed. The proper
instruction for buffer 1 would have been AE_L16_XC1().

Due to this error the MFCC output became incorrect after
wrong circular buffer wrap.

Fixes: 5c92bdd ("Audio: MFCC: Add HiFi4 implementation of MFCC")

Signed-off-by: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com>

Author: singalsu

src/audio/mfcc/mfcc_hifi4.c

@@ -143,7 +143,7 @@ void mfcc_fill_fft_buffer(struct mfcc_state *state)
 	idx += state->prev_data_size;
 	in = (ae_int16 *)buf->r_ptr;
 	out = (ae_int16 *)&fft->fft_buf[idx].real;
-	set_circular_buf1(buf->addr, buf->end_addr);
+	set_circular_buf0(buf->addr, buf->end_addr);
 	for (j = 0; j < fft->fft_hop_size; j++) {
 		AE_L16_XC(sample, in, buf_inc);
 		AE_S16_0_XP(sample, out, fft_inc);